Add support for Json file string translations

Get rid of QGCView, QGCViewPanel and FactPanel. All messages and dialogs are now handled in the root window.

Adding missing qgcView to QGCMapPolygonVisuals instance in SurveyMapVisual.qml

UI Tweaks for all mobile platforms.

all calls to qsTr are done, if I didn't forget anything,
on the PX4 QML files.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Add scroll height indicators to Flickable

- New MissionManager
- Plumb MissionManager through MissionEditor
- Mission Editor supports get/set

Airframe QML: Fix order-dependency of config. Highlight selected airframe more clearly. Allow combo box action to select the airframe as well. Allow single click on icon to select airframe.

Using wrong control

- More more on making QGCView real
- Converted Parameter Editor to QGCView